Presentation
Progressive abdominal distension with weight loss.
Patient Data
There is a large heterogeneous retroperitoneal mass measuring (40 x 23 x 35 cm) composed of fatty-density, soft tissue components, multiple thickened internal septa as well as sparse punctate calcifications in its pelvic component. No significant enhancement is seen on postcontrast images. The left kidney is completely surrounded by this lipomatous mass and displaced to the right. The left lobe of the liver, pancreas, spleen, and stomach are displaced superiorly and small bowel and colon anteriorly and to the right.
No enlarged abdominal or pelvic lymph nodes. No intraperitoneal effusion was seen.
A small submucosal uterine mass, probably a leiomyoma.
Case Discussion
CT features of a large retroperitoneal mass of complex density containing fatty/soft tissue components, thickened internal septa, and punctate calcifications, highly suggestive of retroperitoneal liposarcoma (pathologically proven).
Additional contributor: Dr. Ahmed Hamza, general surgeon, Ibn Sina Clinic, Batna, Algeria